Mary does not look well. She ------ be ill是 一道选择题 A can B.can not C.must D.must not

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Mary does not look well. She ------ be ill是 一道选择题 A can B.can not C.must D.must not
Mary does not look well. She ------ be ill
是 一道选择题 A can B.can not C.must D.must not

Mary does not look well. She ------ be ill是 一道选择题 A can B.can not C.must D.must not
C
因为mary看起来很不好,Must表推测,较为肯定的推测

may

may 可能

C 表猜测的